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Finding the Fourth Proportional to 345,503.81, 518,329.53 and 120,871.58

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Solution

The fourth proportional to 345,503.81, 518,329.53 and 120,871.58 is: 181,333.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    345,503.81 : 518,329.53 = 120,871.58 : x
  2. Step 2: Convert to fraction form
    345,503.81/518,329.53 = 120,871.58/x
  3. Step 3: Cross multiply
    345,503.81x = 518,329.53 × 120,871.58
  4. Step 4: Simplify right side
    345,503.81x = 62,651,306,055.75
  5. Step 5: Solve for x
    x = 62,651,306,055.75/345,503.81
  6. Step 6: Final answer
    x = 181,333.18

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.